Cutting level | Cross sectional area (mm2) | ||||
---|---|---|---|---|---|
Group | Immediate postop. | 1YR | Difference | † P | |
Joint line | 1 | 41.5 ± 6.6 | 54.6 ± 11.3 | 13.2 (31.7%) | < 0.001 |
2 | 42.0 ± 9.1 | 57.3 ± 12.1 | 15.4 (36.6%) | < 0.001 | |
* P | 0.523 | ||||
Mid-tunnel | 1 | 41.8 ± 7.2 | 58.6 ± 11.6 | 16.8 (40.1%) | < 0.001 |
2 | 41.9 ± 8.7 | 70.0 ± 19.5 | 28.1 (66.9%) | < 0.001 | |
* P | 0.028 | ||||
Mid-screw | 1 | 61.0 ± 10.5 | 77.6 ± 13.3 | 16.6 (27.2%) | < 0.001 |
2 | 63.3 ± 9.8 | 73.9 ± 14.2 | 10.6 (16.8%) | < 0.001 | |
* P | 0.024 | ||||
Outlet | 1 | 62.0 ± 10.6 | 69.2 ± 15.1 | 7.3 (11.7%) | < 0.001 |
2 | 61.6 ± 11.3 | 68.4 ± 14.4 | 6.8 (11.0%) | < 0.001 | |
* P | 0.833 |